import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'
import Welcome from '../components/Welcome'
import Users from '../components/user/Users.vue' 
import Rights from '../components/power/Rights.vue'
import Roles from '../components/power/Roles.vue'

Vue.use(VueRouter)

const routes = [
  { path: '/', redirect: '/login'},
  { path:'/login', component:Login },
  { path:'/home', component:Home, redirect: '/welcome', children: [
    { path: '/welcome', component: Welcome},
    { path: '/users', component: Users},
    { path: '/rights', component: Rights},
    { path: '/roles', component: Roles}
  ]}
]

const router = new VueRouter({
  routes
})

// 挂载路由导航守卫，没有token的情况下不允许跳转，不允许在浏览器直接输入路由地址
router.beforeEach((to, from, next)=>{
  //to 将要访问的路径
  //from 代表从哪个路径跳转而来
  //next 是一个函数，表示放行
  // next() 放行 next('/login') 强制跳转
  if(to.path === '/login') return next(); //将要访问登录页直接放行
  //获取token
  const tokenStr = window.sessionStorage.getItem('token')
  if (!tokenStr) return next('/login')
  next()
})


export default router
